Lamp



F. SCHWARTZ Jan. 19, 1937.

LAMP

Filed Nov. 30, 1935 INVENT R Eederlf SCWZ PAUL A.nu. r. ATTORNEY Patentecl Jan. 19, 1937 UNITED STATES LAME Frederck Schwartz, Brooklyn, N. Y., assignur to Artistic Lamp Manufactuxing Company, Inc.

Application November 30, 1935, Serial No. 52,297

7 Claims.

My invention relates to improvaments in lamps particularly suited to the use of a multifilament electric bulb and has among its objects to provide for:

' 1A portable or semi-portable lamp combining a stand and switch chamber for multi-circuit switches.

2A stand having a socket and switch chamber for multi-circuit switches and multi-circuit socket for a multi-filament electric bulb.

3A lamp and stand and multi-filament electric bulb and refiector with said bulb at its focal point.

4A portable indirect or semi-direct lighting refiector and multi-filament electric bulb whereby illumination of various degrees of intensity may be prgduced with all degrees of illumination atthe greatest efficiency due to the relationship of a single bulb having a multi-filament at the focal point or point of greatest reflecting efiiciency for the current consumed at each of the various degrees of. illumination.

5-:A lamp stand, a switch and bulb chamber at the upper end of the stand and a reflector and single multi-filamcnt electric bulb and an indirect or semi-indirect refiector shaped and located in relation to the filaments of the bulb to efiect the maximum illumination from each and all filaments singly or combined with respect to the current consumed.

6A neat portable lamp for indirect lighting having a refiector and single bulb which produces the desired degree cf illumination by .switching on one or more filaments in the bulb which by reason of the relationship of the bulb to the refiector gives a maximum efficiency for each or all of the filaments combined.

7A portable lamp combining direct lighting bulbs with et variable indirect bulb to give variable degrees of illumination as desired by the use of multi-circuit switch forming a part of the lamp permitting the use of a standard current single circuit plug.

I accomplish these and other objects by th construction illustrated in the accompanying drawing forming a part hereof in which;

Figure 1 is a partial section and elevation of my lamp.

Figure 2 is a detailed fragmentaiw.view of the multi-filament bulb and socket as well as a diagrammatic view of the circuit and switch.

Figure 3 is a section of the switch at 3 Figure 4.

ure 3. I 1

Figure 4 is a section of the switch at 4 Fig- Figures 5, 6, 7, and 8 are diagrammatic views showing the various positions of the switch.

Similar reference characters refer to similar parts of my device throughout the several views of the drawing and in the following specificatiens all of which define the parts as succinctly set forth in the appended claims which cover my invention and for which these Letters Patent have been granted.

My lamp preferably comprises a base (l) into which the electric cord .(2) and ordinary plug (3) supply the current from a wall or other house supply socket in the usual manner and which need not be further described as the source of household electric current and its connecticns to lamps and other electric fixtures have become so common practice that few are unfamiliar with the common use of electric current. The ordinary electric cord or flexible pair of wires after entering the base (l) passes up through the hollow vertical standard (4) to the switch chamber (5) for the direct lighting bulbs (6). The wiring and switch (1) is so arranged that one or more of said bulbs (6) may be lighted from said switch which in its operation is similar to the switch (8) preferably located above the switch (1) and also partially concealed in the switch chamber (5).

The switch (8) is so located, constructed and wired to the socket (9) that one of the wires of the cord (2) may be disconnected thus shtting off the light from the'bulb (ID) and the circuit from both filaments (A) and (B) as may be seen by referring to Figure 5 of the drawing in which the wire (X) from the plug(3), which is shown as the positive side of the circuit is connected to the spring brush (l l). V

The switches (1) and (8) are here shown as having four positions of operation, each position shown in one of the Figures 5, 6, 7, and 8'.

While I have shown a particular type of switch suitable to four operating positions it may be desirable to use a switch suitable for more circuits and therefore more positions 015 operation than herein illustrated and described.

So that the function of my multicircuit switch may be followed a description of its| construction in its simplified form follows: particular reference being made to Figures 3 to 8 inclusive as well as the parts of thei' switches which may be seen in Figures 1 and 2.

The body of insulating material (I2) journals one end of the spindle (l3) the other end of which is held concentric to the threaded shank (M) and metal housing (l5). Journaled 55 in said threaded shank (I4) is the stem (l6) Which holds the other end of said spindle and one end of the torsion spring (I1) coiled around said spindle and having its other end secured to the revolving serrated membcr (I8). 'Ihe contacts or commutator (I9) as may be seen is so secured to said member (I8) that there are one 1955 contacts than serrations. Thus where this serration is exposed the insulated surface of the member (I8) contacts the brush (I l) as shown in Figure 5 of the drawing and no circuit is completed. At this position all filaments of the bulb (Il!) are not heated and light is oi.

By referring to Figure 6 of the drawing it will be seen that a movement of the member (I8) and contacts (I9) has been made and thaii the brush (Il) connects the commutatcr (I9) which in turn connects the brush (II) and its wire (X) to the brush (20) and its connecting wire (A) and filament (A'). A further 90 turn of the stem (I6) and consequent movement of the commutator (I9) as may be seen in: Figure 7 connects the brush (II) and source of supply wire (X) to the spring brush (2 I) and the wire (B) and filament (B) which may be of greater illuminating capacity than the filament (A). By a third 90 movement of the parts the commute/501 (I9) as may be seen in Figure 8 the brush (II) and (X) source of current is connected to both (A) and (B) wires and both filaments.

A and B combining the power of illumination 01 the smailer and larger filaments to give a third degree of illumination and as above stated the number et circuits. filaments and operating positions may be modified ;to give any number of variations of intensity of light or illumination as desired by modifying the switch and its contacts and movements.

The connections from the switch brushes (20) and (2l) and wires A and B may be further tollowed through their connections to the socket (22) and base (23) of the bulb (I0) by referring to Figure 2 of the drawing. The wire A, it will be seen, connects to a yielding ring contact (24) in the socket While the wire B connects to the center contact (25). The parts (24) and (25) have a counterpart (24) and (25') in the base of the bulb thus connecting the filaments (A') and (B) to the wires (A) and (B). The opposite or negative wire (C) connects to the metal interna] thread (26) of the socket (22) which contacts the external metal'threads (21) of the base (23) of the bulb (ID).

Above the switch chamber (5) and preterably connected to it I have provided the socket housing or chambcr (28)' for the socket (22) and secured to the open upper end of the socket chamber I have provided the reflector (29) which is soshaped and positioned in relation to the illuminated' portion of the filaments (A') and (B) that the rays of light thereirom are reflected and projected from the point 01 illumination et the bulb (I0) to the desircd coverage of the ceiling of the room thereby at all degrees O1 illumination the maximum intensity of reflection is produced as may be seen by referring to Figure 1 of the drawing which shows some of the rays of light and their relative angles et their switch (1) in the same manner as the fila- 2 ments (A) and (B) of the multi-filament bulb (l0) are connected to the similar switch (8). Two of three lamps for instance may be connected to a single circuit as described above for the larger filament (B).

The refiector (29) may also be of translucent material peimitting partial lighting below from the bulb l0) I am aware that parabolic reflectors have been, used to direct the rays of light from bulbs and arcs t0 concentrate these rays in beams to obtain the maximum cf illumination over a restricted fleld. It is by the use of a modification of such a reflector for my indirect lighting lamp that I use a new concentration of rays from a lamp having several circuits brought to and centered at a point within the bulb by using filaments of difierent current consumption which may be lighted one after the other and then collectively to give a light of varying degrces of illumination by the operation of a multi-circuit switch within the lamp thus making it possible to attach the lamp with the ordinary house current and a single circuit cord and plug. By the use of a single bulb positioned at a fixed point within a reflector for indirect lighting that for a given current consumpticn the light from the smallest filament or the combination of filaments in my' multi-fllament bulb is projected at the maximum for the current consumed.

It will be seen that no resistance or rheostat is used to vary the illumination from my bulb and that as all light is refleeted at a fixed point in relation to my reflector the maximum light is projected.as desired to the ceiling and no current is wasted when less light is desired.

. By the arrangement of the multi-circuit switch in the lamp, the complication 01 wires and circuits is conflned to the switch chamber ci the lamp which has proved an important and valuable advancage as my lamp with its unusual and desirable variations of illumination is plugged into any ordinary wall or fixture outlet.

While I have described and also illustrated one of the several forms and styles of my lamp as now manufactured, I do not wish to be limited to the details as defined in the specificaticns and drawing but Wish to depart thereircm within the scope of the appended claims which succinctly set forth my invention.

I claim:

1. In a portable lamp, having a switch and socket for a multi-fllament -bulb and a single circuit plug-in cord or source of electric current to said switch; said switch being constructed and arranged to complete the single circuit to each of the filaments of said multi-fllament bulb or to ail of said filaments.

2. In a portable lamp, having a switch and socket for a multi-filament bulb and a single circuit plug-in cord or source et electric current -to said switch. said switch being constructed and arranged to complete the single circuit to each of the filaments of said multi-filament bulb or to all of said filaments, and a refiector having a surface and positioned in relation to the filaments of said bulb to reflect light rays upwardly from one or more .of its filaments.

3. A portable lamp comprising a base, a combined multi-circuit switch and socket and a muIti-filament bulb secured in said socket, said portable lamp having a single circuit plug and a single circuit electric cord to said switch and means for operating said switch to connect each or all of the filaments in said multi-filament bulb whereby various degrees of illumination may be produced by the operation o f said multicircuit switch.

4. In a portable lamp for indirect lighting wherein the bulb of the lamp is supported by a a stand, a two-wire circuit extending through the stand to a switch and socket chamber, a socket for a multi-filament bulb in said chamber, a muIti-filament bulb mounted in said socket and a switch in said chamber constructed and arranged to complete the circuit to each of the filaments of said multi-filament bulb or to all of said filaments.

5. A portable lamp comprising a base, a standard, a pair of wires extending from the base upwardly through the standard, a chamber mounted on the top of the standard, three tubular lamp supporting arms branching out- Wardly from the chamber, a switch in said chamber, wires extending from the switch through the arms to lamps mounted thereon,

a second chamber mounted above the first chamber, a lamp socket and a switch in the second chamber, a lamp bulb having two filaments cf different'wattage in said socket, the last named switch adapted to energize either or both of said filaments, an upwardly directed refiector surrounding said lamp bulb and a shade mounted above said refiector and extending downwardly around said outer lamps.

6. A portable lamp comprising a supporting base, a hollow standard, a switch and socket chamber mounted on the top of said standard, a multiple switch in the lower part of the chamber, an operator for the switch extending outwardly through an opening in the chamber, a socket for a multiple filament lamp bulb in the upper part of the chamber, a multi-filamcnt lamp bulb mounted and extending upwardly from the socket, said switch being adapted to close et circuit to each filament of the lamp separately or to all filaments in parallel, wires for ,-Ja single electric circuit extending from the ;switch downwardly through the standard and Connections from the switch tothe socket to provide single circuits for each filament and parallel circuits for all filaments.

7. A portable lamp having a hollow standard, a switch chamber mounted on the standard, three incandescent lamp supporting arms extending outwardlyirom said switch chamber, a. switch in said chamber, single circuit wires extending upwardly through the standard and through the switch chamber, a second chamber above said switch chamber, a second switch in said second chamber, a multi-filament lamp socket in said second chamber above the switch and having the socket opening extending upwardly, the second switch bing adaptefl t op-' erate independently of the first switch to connect each of the multiple filaments separately or all at once in parallel.

FREDERICK SCHWARTZ. 

